Black-throated blue warbler.


Had a nice grouping of warblers the other day at Rondeau Provincial Park.
Among them was this black-throated blue warbler.

Setophaga caerulescens
In the Dominican Republic, Black-throated Blue Warblers take advantage of a sweet treat created by insects harvesting tree sap. These insects feed on tree sap and excrete drops of sweet sap or "honeydew" from their back ends that the warblers drink up.
source - https://www.allaboutbirds.org/g…/Black-throated_Blue_Warbler

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